The Oral-B Pro-Health Jr. Sensitive Clean replacement toothbrush heads are perfect for kids to get a healthy, thorough clean. While their smiles continue to grow and develop, there's no better time to start healthy oral care habits. The brush head is designed to fit the mouth of kids, resulting in an amazing, tooth-by-tooth clean. Use these brush heads with the Oral-B Pro-Health Jr. rechargeable toothbrush to unlock the Disney Magic Timer™ App by Oral-B that revolutionizes the way children brush for a dentist-recommended 2 minutes.